body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.user-bar {
    background-color: #f4f4f4;
    padding: 10px;
    text-align: right;
    border-bottom: 1px solid #ccc;
}

header {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 20px;
}

main {
    padding: 20px;
}

.timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: #ccc;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -13px;
    background-color: white;
    border: 4px solid #FF9F55;
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.left {
    left: 0;
}

.right {
    left: 50%;
}

.left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid white;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent white;
}

.right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid white;
    border-width: 10px 10px 10px 0;
    border-color: transparent white transparent transparent;
}

.right::after {
    left: -13px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: 6px;
    border: 1px solid #ccc;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px;
}
